JP2869275B2 - Storage door device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door device for keeping a door closed and preventing the door from being half-opened in a storage such as a refrigerator or a low-temperature storage for transporting goods.

[0002]

2. Description of the Related Art Conventionally, in this type of storage, when the door is opened halfway due to incomplete closing of the door, cool air inside the storage chamber leaks. In particular, in low-temperature refrigerators for transportation and transportation, doors are often opened carelessly due to vibrations and impacts. An accident that causes damage occurs.

On the other hand, a glass door such as a showcase has a structure in which a torsion bar is built in a pivot shaft of the door, and the restoring force constantly biases the door in a direction to close the door. The mainstream is a door manufactured by assembling a frame such as a door, which is difficult for a door manufactured by foaming a heat insulating material.

Therefore, for example, in Japanese Patent Publication No. 52-30920 (E05C3 / 00), a mounting frame, an L lever having one short end pivotally attached to the mounting frame, and a A dashpot cylinder pivotally connected at the lower end thereof, a dashpot piston shaft pivotally attached to the bending point of the L-lever, and a sprung member for constantly pressing the piston shaft downward. A hook plate is provided on the wall frame facing the non-pivot side of the door, and when the door is opened, the L lever is rotated by the hook plate against the firing, and the bending point of the L lever When the door is closed beyond the dead point on a straight line connecting the pivot point of attachment of the mounting frame to the cylinder and the L lever, when the door is closed, the L lever is rotated in the opposite direction by the hook plate, The bending point of the L lever When returning the power spring exceeds the Kishiten, it has a structure in which exerting an dashpot.

According to such a closure, regardless of the structure of the door, the piston shaft is pressed below the cylinder by the urging force of the spring just before the door is closed, so that the door is half-opened even if the door is incompletely closed. Is prevented, and the closed state of the door is maintained, so that it is possible to prevent the door from being carelessly opened due to vibration or impact.

[0006]

However, when the door is opened, the L-lever is locked and stands almost vertically from the door, so that the limbs of the user and the articles to be delivered come into contact. It is easy for them to contact the L-lever from the pivot side of the door and rotate the L-lever. When the bending point exceeds the dead point, the L-lever is left as it is by firing, and in that state, If the user closes the door without noticing, the L lever abuts on the wall frame and the door cannot be closed, and in the worst case, the L lever and the wall frame may be damaged.

On the other hand, in a so-called double door type door in which the opening is opened and closed by two doors pivotally supported on both sides of the opening of the storage, it is difficult to seal a butt portion between both doors.
Conventionally, an inner partition was attached to the upper and lower sides of the opening of the storage, and the gasket on the inner surface of the door was adsorbed to the inner partition, but since the opening was bisected by the inner partition, there was a problem that large articles could not be delivered. .

Therefore, in a home refrigerator, a folding (rotating) partition is attached to the non-pivot side of one of the doors, and the gasket of the two doors comes into contact with the one door closed. However, due to the mounting error of the door, it is necessary to configure a considerable margin between the partition and the upper and lower openings. The strength of the door must be increased, which causes a problem that the door becomes heavy and difficult to open and close. Also,
Eventually, since the maintenance of the closing of the door depends on the attraction force of the gasket, there is also a problem that the door is easily opened by the above-mentioned vibration or impact.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and can maintain a closed state of a door without hindering opening and closing of the door, and can prevent half-opening of the door. An object of the present invention is to provide a storage door device.

[0010]

According to a first aspect of the present invention, there is provided a door apparatus for a storage, comprising: a mounting member (cover 31, case 37) fixed to the non-pivot side of the door 3; An L-shaped lever 42 whose end is pivotally connected, a cylinder 38 whose one end is pivotally connected to the mounting member,
A piston shaft 44 protruding from the other end of the cylinder 38 and rotatably pivotally attached to a bending point of the lever 42 and urged toward one end of the cylinder 38 by an urging member.
And a receiving member 33 provided in the storage main body 7. When the door 3 is closed, the long end of the lever 42 is rotated in contact with the receiving member 33, and the bending point is set at the cylinder 38 and the cylinder 38. When a dead point on a straight line connecting the pivot 42 between the lever 42 and the mounting member is exceeded, the closing state of the door 3 is maintained by the lever 42 by the urging force of the urging member, and the door 3 is closed.
When the lever is opened, the lever 42 is rotated by the receiving member 33 against the urging force of the urging member, and when the bending point exceeds the dead point, the lever 42 is locked by the urging force of the urging member. The door 3 corresponds to the side of the lever 42 in a locked state and the pivotal side of the door 3.
A guard (guard piece) 36 for avoiding the receiving member 33 by opening and closing the door 3 is provided.

In the storage door apparatus according to the second aspect of the present invention, two doors 2 and 3 are pivotally supported on both sides of the opening 8 of the storage main body 7 so as to be rotatable. And a mounting member (cover 31, case 37) which is applied to the storage 1 for closing the opening 8 by overlapping the non-pivot side of the other door 3 and is fixed to the non-pivot side of the other door 3. An L-shaped lever 42 having a short end pivotally attached to the mounting member so as to be rotatable;
Cylinder 38 pivotally mounted at one end to a mounting member
And a lever 42 projecting from the other end of the cylinder 38.
The piston shaft 4 pivotally attached to the bending point of the cylinder 38 and urged toward one end of the cylinder 38 by an urging member.
4 and a receiving member 33 provided in the storage main body 7. When the other door 3 is closed in a state where the one door 2 is closed, one end of the long side of the lever 42 is a receiving member. 3
When the bending point exceeds a linear dead point connecting the pivot point between the cylinder 38 and the lever 42 and the mounting member, the lever 42 is biased by the biasing member.
When the other door 3 is opened, the lever 42 is rotated by the receiving member 33 against the biasing force of the biasing member, and the bending point is The lever is configured to be locked by the biasing force of the biasing member when the dead center is exceeded.

[0012]

According to the storage door apparatus of the first aspect of the present invention, when the door is closed, the long end of the lever is connected to the receiving member.
3, when the bending point exceeds a linear dead point connecting the pivot point between the cylinder 38 and the lever 42 and the mounting member, the lever 42 is biased by the biasing member.
Thereby, the closed state of the door 3 is maintained. Therefore, even if the door 3 is incompletely closed, the door 3 does not become half-open, and the door 3 is not accidentally opened due to vibration or impact.

When the door 3 is opened, the lever 42 is rotated by the receiving member 33 against the urging force of the urging member.
When the bending point exceeds the dead point, the lever 42 is locked by the urging force of the urging member. At this time, since the door 3 is provided with a guard (guard piece) 36 corresponding to the locked side of the lever 42 on the door 3 pivot side, the user's limbs and articles are pivotally supported by the door 3. Even if it tries to contact the lever 42 from the side, it comes into contact with the guard (guard piece) 36. Accordingly, the lever 42 is not inadvertently rotated due to the contact, thereby preventing an accident in which the storage 1 and the lever 42 are damaged. In particular, the guard (guard piece) 36 avoids the receiving member 33 even when the door 3 is opened and closed, so that opening and closing of the door 3 is not hindered.

According to the storage door apparatus of the second aspect of the present invention, the other door 3 is closed while the one door 2 is closed, so that one end of the long side of the lever 42 is similarly received by the receiving member. The cylinder 3 is rotated in contact with the
When a dead point on a straight line connecting the pivot point between the lever 8 and the lever 42 and the mounting member is exceeded, the lever 42 keeps the other door 3 closed by the urging force of the urging member. At this time, since the non-pivot side of the other door 3 overlaps the non-pivot side of the one door 2, both the doors 2 and 3 are kept closed by the lever 42, Therefore, the doors 2 and 3 do not open halfway, and the doors 2 and 3 are not accidentally opened due to vibration or impact.

Since both doors 2 and 3 are superposed,
There is no problem in the sealing property, and there is no need to provide a partition at the opening 8 of the storage 1. When the two doors 2 and 3 are opened, the lever 42 is rotated by the receiving member 33 against the urging force of the urging member by opening the other door 3, and the bending point is at the dead point. Is exceeded, the lever 42 is locked by the urging force of the urging member.

[0016]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a low-temperature storage 1 as an embodiment of a storage to which the present invention is applied, with the doors 2 and 3 opened, and FIG. 2 is a perspective view of the low-temperature storage 1 with the doors 2 and 3 closed. 3 is a perspective view of the closure 4 of the present invention, FIG. 4 is a plan sectional view of the low-temperature storage 1 with the doors 2 and 3 opened, and FIG. 5 is a plan view of the low-temperature storage 1 with the doors 2 and 3 closed. FIG. The low-temperature storage 1 is for storing articles such as food, and then transporting the articles while keeping them in a low-temperature state by directly loading them on a carrier such as a truck. A plurality of wheels 6 are mounted to facilitate loading on a carrier. The main body 7 of the low-temperature storage 1 is constituted by a heat insulating box having an opening 8 on the front surface, and a storage room 9 for storing articles such as food is formed inside the main body 7.

On both sides of the opening 8 of the main body 7, pivot shafts 11, 12 are provided.
The doors 2 and 3 are rotatably supported on one side opposite to the pivot shafts 11 and 12 so as to be rotatable, and the doors 2 and 3 are rotatably mounted on the main body 7. It constitutes a double door. The one door 2 is configured by connecting an outer surface material 13 and an inner surface material 14 made of a steel plate with a surrounding frame-shaped resin breaker 16 and filling a heat insulating material 17 inside.

One side of the non-pivot side of the breaker 16 has a stepped shape with a rear portion protruding in the direction of the other door 3, thereby forming a step 18 extending vertically. The other door 3 also connects the outer surface material 19 and the inner surface material 21 made of a steel plate by a surrounding frame-shaped resin breaker 22, and has a heat insulating material 2 inside.
3 and the breaker 22
The one side of the non-pivot side has a stepped shape with a front part protruding in the direction of one door 2, whereby a stepped part 24 extending vertically so as to overlap the stepped part 18 of the one door 2 from the front. Is configured.

The U-shaped magnet gaskets 26 and 27 corresponding to the breakers 16 and 22, respectively, are attached to the inner upper and lower edges and the pivot side edges of the doors 2 and 3, respectively. A gasket 28 which is in close contact with the front surface of the step portion 18 of one of the doors 2 is attached vertically to the rear surface of the step portion 24 of the door 3. A detachable deck pan 29 is attached to the bottom of the storage room 9 of the main body 7, and a cooling device such as a cooler (not shown) is disposed inside the deck pan 29. Retreat with an interval P.

At the lower part of the inner surface of the other door 3 on the non-pivot side, there is provided a cover 31 made of a steel plate and a closure body 32 constituting a mounting member of the closure 4. As shown in FIG. 3, the closure 4 includes the cover 31, a closure main body 32,
This also includes a receiving member 33 made of a steel plate provided on the main body 7 side.

The cover 31 has a substantially U-shaped cross section. In a substantially horizontal state where the cover 31 is opened to the left and right, the mounting portions 34, 34 projecting outward from the U-shaped end are screwed to the inner surface material 21 of the door 3. By doing so, it is fixed to the inner surface of the door 3. Also,
From the edge of the rear wall 35 of the cover 31 on the non-pivot side of the door 3, a guard piece 36 as a guard that stands vertically rearward (toward the storage room 9) is bent.

The closure body 32 is provided with a rear wall 35 of the cover 31.
37 that constitutes a mounting member screwed to the front of the case
A cylinder 38 as shown in FIGS. 4 and 5 which is built in the case 37 and has one end on the pivot side of the door 3 pivotally attached to the case 37 by a rotation shaft 39 (FIGS. 4 and 5). The case 37 is seen through in FIG. 5), and an end on one short side thereof is pivotally connected to the case 37 by a rotation shaft 41 so as to be rotatable.
It comprises a lever 42 having a U-shape and a piston shaft 44 protruding from the other end of the cylinder 38 and rotatably connected to a bending point of the lever 42 by a rotation shaft 43.
Further, in the case 37, an unillustrated spring as an urging member for urging the piston shaft 44 to always pull in the direction of the rotation shaft 39 and a damper (not shown) for suppressing the operation speed of the piston shaft 44 are provided. ing. A roller 46 is attached to one end of the lever 42 on one long side.

On the other hand, a substantially inverted U-shaped opening 48 is cut out from substantially below the front surface 29A of the deck pan 29 at a substantially central portion thereof. It is established from the bottom part of. The receiving member 33 has a substantially U-shaped horizontal cross section, and extends rearward from the upper and lower edges of the rear side 51 in the state where the receiving member 33 is opened in the vertical and door 3 directions, and extends vertically.
Is fixed in the main body 7 by screwing it to the front surface of the fixing plate 49. The front side 53 of the receiving member 33 is the rear side 51
The end 51A of the rear side 51 protruding sideward from the front side 53 is bent forward at an obtuse angle. The interval between the front and rear sides 53 and 51 of the receiving member 33 is set so that the roller 46 can sufficiently enter.

The opening and closing operation of the doors 2 and 3 with the above configuration will be described. First, in the state where the door 3 is opened as shown in FIG. 4, the pivot shaft 4 at the bending point of the lever 42 to which the piston shaft 44 is pivoted is attached.
3 is located on the rear storage chamber 9 side beyond a linear dead center connecting the rotation shaft 39 at one end of the cylinder 38 and the rotation shaft 41 at one short end of the lever 42, and ,
The lever 42 is urged to rotate clockwise in FIG. 4 and is locked so that one long side thereof stands substantially vertically from the inner surface of the door 3 as shown in FIG. At this time, the guard piece 36 is
The door 3 on one side of the long side of the locked lever 42 pivotal side (the pivot shaft 1
2). Therefore, when the door 3 is opened and the long side of the lever 42 is standing up from the door 3 as shown in FIGS.
Even if an attempt is made to contact the long piece from the pivot shaft 12 side, the guard piece 36 will be contacted, so that the lever 42 is inadvertently rotated by the contact of the limb or the article. Can be prevented.

Next, when the opening 8 is closed by the doors 2 and 3, the door 2 is first closed from the state shown in FIG. Next, when the door 3 is closed, the roller 46 at the tip of the lever 42 passes in front of the front side 53 of the receiving member 33 and immediately before the closing,
It comes into contact with the end 51A. Then, when the door 3 is further closed, the lever 42 is rotated counterclockwise in FIG. 4 against the urging force of the spring, and eventually the bending point of the lever 42 to which the piston shaft 44 is pivotally attached. The rotation shaft 43 is on the front side beyond the dead center. Then, the lever 42 is urged to rotate in the counterclockwise direction in FIG. 4 by the urging force of the spring, and one of its long sides is the front and rear sides 53, 5 and 5 of the receiving member 33 as shown in FIG.
Enter between one. After that, the piston shaft 44 urges the lever 42 to press the lever 42 against the back surface of the front side 53 of the receiving member 33 by the urging force of the spring.

At this time, the step portion 24 of the door 3 overlaps with the step portion 18 of the door 2 as shown in FIG. 5, and the gasket 28 comes into close contact with the front surface of the step portion 18. Sealability is ensured. Further, since the step portion 24 of the door 3 overlaps the front side of the step portion 18 of the door 2, the door 2 cannot be opened due to the presence of the door 3. Therefore, the closure 4
Is pressed against the front side 53 of the receiving member 33, so that both the door 3 and the door 2 are maintained in a closed state, and the doors 2 and 3 due to vibration and impact during transportation of the low-temperature storage 1 Can be reliably prevented from being opened. Further, just before the door 3 is closed, when the turning shaft 43 at the bending point of the lever 42 exceeds the dead point, the lever 42 is turned counterclockwise in FIG. Therefore, the door 3 is automatically and slowly closed by the damper, so that the half-opening due to the incomplete closing of the door 3 is also prevented.

During the rotation of the door 3, the guard piece 36 does not contact the front and rear sides 53 and 51 of the receiving member 33. When the door 3 is closed, the guard piece 36 enters the opening 48 on the right side of the fixing plate 49 on the front surface 29A of the deck pan 29 as shown in FIG. There is no.

Next, when the door 3 is opened again from the state shown in FIG. 5, the lever 42 is rotated clockwise in FIG. 5 by the front side 53 of the receiving member 33 against the urging force of the spring. When the turning shaft 43 at the bending point exceeds the dead center, the lever 42 is locked in an upright state as shown in FIG.

In the above, since the closing device 4 is mounted on the inner surface of the door 3, the appearance of the low-temperature storage 1 is improved as compared with the conventional device mounted on the outer surface, and malfunction due to contact of foreign matter is prevented. Danger is reduced. Further, the closing member 4 is provided at a distance P between the front surface 29A of the deck pan 29 and the doors 2 and 3.
, There is no hindrance to closing the doors 2 and 3.

[0030]

As described above in detail, according to the first aspect of the present invention, when the door is closed, the end on one long side of the lever comes into contact with the receiving member and is turned. When the dead center on a straight line connecting the pivot point of attachment and the attachment member is exceeded, the door is kept closed by the lever by the urging force of the urging member. Inadvertent opening due to vibration or impact can be prevented.

When the door is opened, the lever is rotated by the receiving member against the urging force of the urging member. When the bending point exceeds the dead point, the lever is actuated by the urging force of the urging member. The lever is locked. At this time, the door is provided with a guard corresponding to the door pivot side of the locked lever, so that the user's limbs and articles can be removed from the pivot side of the door. From the point of contact with the lever, the lever comes into contact with the guard.Therefore, the lever is not inadvertently rotated by the contact, and an accident such as damage to the storage or the lever due to the malfunction may occur. It can be prevented beforehand. In particular, the guard avoids the receiving member by opening and closing the door, so that there is no problem in opening and closing the door.

According to the second aspect of the present invention, by closing one door while closing the other door, the end on one long side of the lever similarly contacts the receiving member and is rotated. When the bending point exceeds a dead point on a straight line connecting the pivot point between the cylinder and lever and the mounting member, the lever keeps the other door closed by the urging force of the urging member. At this time, since the non-pivot side of the other door overlaps the non-pivot side of one door, both doors will be maintained in their closed state by the lever, and therefore both doors will be opened halfway. The door does not accidentally open due to vibration or impact.

Further, since both doors are superposed, there is no problem in the sealing property, and there is no need to provide a partition at the opening of the storage. Accordingly, an increase in the weight of the door can be suppressed, so that the door can be smoothly opened and closed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a low-temperature storage as an embodiment of a storage to which the present invention is applied, with a door opened.

FIG. 2 is a perspective view of a low-temperature refrigerator with a door closed.

FIG. 3 is a perspective view of a closure.

FIG. 4 is a cross-sectional plan view of the low-temperature refrigerator with a door opened.

FIG. 5 is a plan cross-sectional view of the low-temperature storage with the door closed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature storage 2 Door 3 Door 4 Closure 7 Main body 8 Opening 9 Storage room 11 Pivot shaft 12 Pivot shaft 18 Step part 24 Step part 31 Cover 33 Receiving member 36 Guard piece 37 Case 38 Cylinder 39 Rotating axis 41 Rotation Shaft 42 Lever 43 Rotating shaft 44 Piston shaft

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yoshiaki Takano 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) F25D 23 / 02

Claims (2)

(57) [Claims] 1. A mounting member fixed to a non-pivot side of a door,
An L-shaped lever having a short end pivotally pivotally attached to the mounting member, a cylinder pivotally pivoted at one end to the mounting member, and a cylinder protruding from the other end of the cylinder. The lever is pivotally attached to a bending point of the lever, and includes a piston shaft urged in one end direction of the cylinder by an urging member, and a receiving member provided in a storage main body, and the door is provided. When the lever is closed, the end on one long side of the lever is rotated in contact with the receiving member, and the bending point exceeds a dead point on a straight line connecting the pivot point between the cylinder and the lever and the mounting member. When the door is closed by the lever by the urging force of the urging member, and when the door is opened, the lever rotates by the receiving member against the urging force of the urging member. Is moved, and the bending point exceeds the dead point. In the door device constructed as the lever is to be engaged by the biasing force of the biasing member,
A door device for a storage, wherein the door is provided with a guard corresponding to the door pivot side of the lever in a locked state, and a guard for avoiding the receiving member by opening and closing the door. 2. The two doors are pivotally supported on both sides of an opening of a storage body, and the opening is closed by overlapping the non-pivoting side of one door with the non-pivoting side of the other door. In the storage, a mounting member fixed to the non-pivot side of the other door, an L-shaped lever pivotally connected to a short end of the mounting member rotatably, and one end of the mounting member to the mounting member. And a cylinder protruding from the other end of the cylinder, rotatably pivotally attached to a bending point of the lever, and urged toward one end of the cylinder by an urging member. A piston shaft, and a receiving member provided in the storage main body. When the other door is closed with the one door closed, the end on one long side of the lever is the receiving member. And the bending point is pivoted between the cylinder and lever and the mounting member. When a dead point on a straight line connecting the landing points is exceeded, the closing state of the two doors is maintained by the lever by the urging force of the urging member, and when the other door is opened, the lever receives the receiving lever. The lever is rotated by a member against the urging force of the urging member, and the lever is locked by the urging force of the urging member when the bending point exceeds the dead point. A door device for storage.